when 2x² - 5x - 1 is subtracted from 7x² - 4x + 8, what is the result?
A. 5x² + x + 9
B. 5x² - 9x + 9
C. 5x² + x + 7
D. 5x² - x + 7
A. 5x² + x + 9
B. 5x² - 9x + 9
C. 5x² + x + 7
D. 5x² - x + 7
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Answer:
b. -5x²-9+7
Step-by-step explanation:
2x²-5x-1-7x²-4x+8= -5x²-9+7
Group like terms
= 2x²-7x²-5x-4x-1+8
Add similar elements: 2x²-7x²= -5x²
= -5x²-5x-4x-1+8
Add similar elements: -5x-4x= -9x
= -5x²-9x-1+8
Add/Subtract the numbers: -1+8= 7
= 5x²-9+7
(hope it's help)
Answer:
-5x²-9x+9 or B. 5x²-9x+9
Step-by-step explanation:
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